Vacuum switch contact
A vacuum switch and contact technology, applied in the electrical field, can solve the problems of difficult to solve the problem of electric field concentration, high possibility of re-ignition, insufficient voltage resistance, etc., to improve the current breaking capacity, reduce the magnetic field strength, and meet the effect of high voltage resistance.
Active Publication Date: 2011-01-12
BEIJING BOE VACUUM ELECTRONICS CO LTD
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Problems solved by technology
[0004] The defects of the existing technology are: due to the limitation of the structural shape, it is often difficult for the vacuum switch contacts to form a good longitudinal magnetic field for arc suppression, and it is difficult to solve the problems of electric field concentration, insufficient withstand voltage and high possibility of re-ignition during high-voltage breaking and other problems; for high-voltage circuits, only 36 kV voltage breaking can be realized. For higher voltage circuits, especially 72 kV high voltage, there is no vacuum switch contact structure that can meet the requirements of effective arc extinguishing during breaking. Require
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no. 1 example
[0016] figure 1 It is a schematic cross-sectional structure diagram of the first embodiment of the vacuum switch contact of the present invention. like figure 1 As shown, the front end of the first contact 1, that is, the part where the first contact 1 and the second contact 2 contact each other is a convex hemisphere 30, and the rear end of the first contact 1 is the same shape as the convex hemisphere 30. The hemisphere, that is, the first contact 1 is a sphere as a whole. The second contact 2 can adopt an annular body contact 40, the cross section of the annular body contact 40 perpendicular to the axis is circular, and the longitudinal section of the annular body contact 40 along the axis direction is circular, then The circular annular body contact 40 is socketed and matched with the convex hemispherical body 30 at the front end of the first contact 1 .
[0017] In this embodiment, the rear end of the first contact can also be a cylinder, and the cross section of the c...
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The invention discloses a vacuum switch contact, comprising a first contact and a second contact which are arranged opposite to each other. A convex hemispheroid is arranged at the front end of the first contact and the second contact is a circular body which matches with the convex hemispheroid in shape. The first contact comprises a first electric conduction assembly and a first magnetic conduction assembly, which extend along the same direction and are in abuttal joint with one another. The electric conduction assembly and the magnetic conduction assembly of the first contact are matched like Yin-Yang fish in shape. The second contact comprises a second electric conduction assembly and a second magnetic conduction assembly which are divided by the midline of the second contact. The first magnetic conduction assembly of the first contact is arranged opposite to the second electric conduction assembly of the second contact, and the second magnetic conduction assembly of the second contact is arranged opposite to the first electric conduction assembly of the first contact. The vacuum switch contact reduces restrike possibility at the time of voltage disjunction and arc voltage andsatisfies the requirement of high voltage disjunction.
Description
technical field [0001] The invention relates to a vacuum switch contact, in particular to a contact in an arc-extinguishing chamber of a vacuum switch tube, and belongs to the field of electrical technology. Background technique [0002] Switching equipment is a device that must be used in the circuit, and it plays the role of closing and breaking the circuit. Arc extinguishing is required during the breaking process of the switch contacts, so that the contacts can be separated decisively and prevent the arc from increasing the temperature of the switch and causing the loss of the switch. Vacuum switches are widely used in electric power because of their small contact gap, high withstand voltage capability, low arc voltage, high breaking current capability, low electrical wear and high electrical life. in the circuit. [0003] Most of the existing vacuum switch contacts are columnar bodies, and each contact is provided with a magnetic conduction part and a conductive part....
Claims
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IPC IPC(8): H01H33/664H01H1/06H01H33/18
Inventor 任建昌
Owner BEIJING BOE VACUUM ELECTRONICS CO LTD